Minutes from meeting of non-oscillation physics group of the proton
driver study, Wednesday, March 21st, 2001.

The meeting began with brief discussion on a recent addendum to the
proton dirver study to consider beam energies from an 8 GeV booster in
addition to from a 16 GeV Booster.  This change will not affect our
work since NuMI beam energy and intensity should remain the same
either way.

Discussion of various different physics topics and detectors to go
with them for non-oscillation phsycis followed.  We began with
possible measurements of Structure functions on light targets.
Different possible light targets were discussed both for getting
physics results out and for difficulties in making/operating such
targets.  Different light targets could be placed in front of the
MINOs near detector for SF measurements.  The simplest light target to
work with is Carbon.  One possibilty for a physics program would be to
have Carbon and Iron targets in the short term and Hyrdrogen or
Deuterium in the long term.  Discussion on instrumenting such a target
followed.  Possibilites suggested included liquid argon TPCs.

Other issues of interest particularly in the nuclear community include
nu-e elastic scattering measurements to measure elastic form factors,
measuring the Q^2 dependence of the axial form factors and using NC/CC
ratio to measure the strange form factors.  Measurement of the n/p ratio is
sensitive to delta S and to new physics such as searches for
non-standard Z bosons.

Target issues were discussed.  How fine a resolution is needed/can be
constructed easily?  Target can be instrumented with 1cm strips of
scintillator like those used for the MINOs detector perhaps
interspersing these scintillator plates with carbon plates.  What
about electronics?  How fast of a readout system will be needed given
number of events expected?

Structure function topics of interest in the community (hot topics)
include measurements of intrinsic charm and d/u ratio at high x.
These topics are of interest to a large audience so should definately
be addressed.  Issues to think about for these measurements: How much
will we gain with higher statistics?  with better precision?  More
structure function topics discussed include shadowing effects on the
valence versus the sea, gluon distribution at high x and region where
resonance meets DIS.

There are clearly lots of interesting topics to study with a new
proton driver.  We discussed the need to identify priorities to
explore completely and list any other topics we do not have time to
fully address.  For the next meeting, everyone should think about the
different physics to pursue in this study and come up with a priority
list which includes basic ideas on what kind of physics detectors
would be needed for those physics topics, what beam energies, what
detector resolutions and what statistics are needed?  Once priorites
are hammered out, we could choose to split into subgroups to work in
more detail on each subject.

Next meeting scheduled for Wednesday, April 4th.  See you then!